Which of following refers to the process that facilitates plant communities gradually changing over a period of time in order to respond to their environments?
a
development
b
succession
c
growth
d
disturbance

The correct option is B

Succession refers to the process that facilitates plant communities gradually changing over a period of time in order to respond to their environment.

Explanation:

Succession can be described as changes that occur in an ecosystem in response to the changes in the environment or any other disturbances.

Succession can be of two types. 1. Primary succession 2.Secondary succession

Primary succession occurs on lands where there was no life before. With time, plants start to grow here and a community is developed.

Secondary succession occurs on lands that have been destroyed due to any disturbances like a flood or a fire. Over time, new plants start to grow on this land and a community is developed.    

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.

the answer is sex-linked recessive.